body {
    font: 14px/1.5 Helvetica Neue, Helvetica, Arial, Microsoft Yahei, Hiragino Sans GB, Heiti SC, WenQuanYi Micro Hei, sans-serif;
    margin: 0;
    padding: 0;
}

#top {
    background: #333333;
    height: 50px;
}

.top_left {
    margin-left: 150px;
    display: inline-block;

}

.top_right {
    margin-left: 200px;
    display: inline-block;
}

#top > div > a {
    font-size: 12px;
    color: #b0b0b0;
    margin-right: 15px;
    text-decoration: none;
    line-height: 50px;
}

#center {
    height: 100px;
    overflow: hidden;
    position: relative;
}

#top_logo {
    width: 60px;
    height: 60px;
    position: absolute;
    left: 130px;
    top: 20px;
}

#top_logo > img {
    width: 100%;
    height: 100%;
}

.top_list {
    width: 650px;
    height: 100%;
    margin-left: 400px;
    display: inline-block;
}

.top_list > ul {
    list-style-type: none;
    margin: 0;
    padding: 0; /*去掉自带的内外边距*/
}

.top_list > ul > li {
    font-size: 16px;
    color: #333;
    float: left; /*所有li全部浮动则自动识别高度为0 */
    margin-right: 30px;
    line-height: 100px;
    text-align: center;
}
.top_input{
    display: inline-block;
    width: 300px;
    height: 40px;
    position: absolute;
    bottom: 25px;
    margin-left: 40px;
}
.top_input>div{
    float: left;
    height: 40px;

}
.top_input>div>input[type="text"]{
    width: 180px;
    height: 40px;
    margin: 0;
    padding: 0;
}
.top_input>div>img{
    width: 40px;
    height: 40px;
    border: 1px solid black;
}